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Finding the Fourth Proportional to 42,172.14, 63,248.87 and 12,179.87

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Solution

The fourth proportional to 42,172.14, 63,248.87 and 12,179.87 is: 18,267.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,172.14 : 63,248.87 = 12,179.87 : x
  2. Step 2: Convert to fraction form
    42,172.14/63,248.87 = 12,179.87/x
  3. Step 3: Cross multiply
    42,172.14x = 63,248.87 × 12,179.87
  4. Step 4: Simplify right side
    42,172.14x = 770,363,014.25
  5. Step 5: Solve for x
    x = 770,363,014.25/42,172.14
  6. Step 6: Final answer
    x = 18,267.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.